home in the United States is at most 23. Forty-three U.S. adults, all age 40, were surveyed. The
sample average age was 24.2 with a standard deviation of 3.7. Is there evidence to suggest that the
average age a "child" moves permanently out of his parents' home has increased?
(ii) what is the test value (test statistics)?
(a) - 2.13
(b) 2.13
(c) 0.32
(d) - 0.32
(e) 1.96